Pressure device for electric-current collectors.



No. 875,788. PATENTED JAN. 7, 1903. 0. DE KANDO. PRESSURE DEVICE FORHBLEOTRIQQIIVBBENITGOLLE i .GI ORS. APPLICATION FILED MAY 6.1905.

4 EHEETS-SHEET 1.

Invg ntbr; (Maynard/6112M w No. 875,788. PATENTBD JAN. 7. 1908.

8. DE KANDO.

PRESSURE DEVICE F08 ELECTRIC CURRENT COLLECTORS.

FILED MAY 6.1905.

4 SHEETS-SHEET 2.

APPLICATION 3 @Homwuw PATENTED JAN. 7, 1908.

, 0. DE KANDO.

PRESSURE DEVICE FOR ELECTRIC CURRENT COLLECTORS.

APPLIGATIONIILED MAY 6.1905.

4 SHBETSSHEET I IIIIIIIII IIII I IIIIIIIIII II! In IIIIII No. 875,788. PATENTED JAN. 7. 1908.

0. DE KANDO.

PRESSURE DEVICE FOR ELECTRIC CURRENT GOLLEGTORS.

APPLIGATIDN FILED MAY 6.1905.

4 SHEETfi-SHEET 4.

To an whom it may concern:

Be it known hat I, COLOMAN DE 'subject of .the King dent of Budapest, in the Empire of Austria-' .umqgnn sxrnrrs PATENT oFFioE.

GOLOMaN DE KANDO, OF BUDAPEST, AUSTRIA-HUNGARY, ASSIGNOR, sriinsun ASSIGNMENTS, 'rowns'rmenouss MACHINE COMPANY,A CORPORATION-OF PENNSYLVANIA.

- PRESSURE DEVICE FDR ELECTRIC-CURRENT COLLEQ'PQRS. I i

KANno, a of Hungary, and a resi- Hungary, have invented certain novel and useful Improvements in Pressure Devices for Electric-Current Collectors, of which the following is a specification.

' My invention relates to means for maintaining the requisite pressure between a trolley and the trolley wire underfliilerent running conditions and it consists of certain novel parts and combinations ofparts pointed out in the claims-concluding this specification.

In the accompanying drawings, I have 1' shown my invention applied in one of its 4 simplest forms and it will be understood that claims.

varlous modifications may be made, and va- 20 out "departing from the spirit of my mvenrious detail forms of'ap'paratns used, withtion and without exceeding the scope of my In the accompanying drawings Figure 1 shows diagrammatically the complete arran ement at high speed running, with the on a vertical plane.

trolley lifting device in a sectional elevation Fig. 2 'is a horizontal section of the trolley lifting device on larger scale, at low speed running. Fig. 3 shows the lifting pistons corresponding to the lowered position of the trolley pole. Fig. 4-is a view similar to Fig. 1 with means for connecting the motors in multiple. Figs. 5,

.6 and '7 show a trolley lifting device'adapted to afford three grades of pressure,

Fig. 3 shows a trolley lifting device arranged so .thatthe s rings act normally to press the trolley wit the maximum force against the .trolley wire, the piston acting against the .springs. Fig. 9 is a view substantially similar to Fig.- 1 showing the trolley pole depressed.

" The following is a description of the drawmgs, which show one form of structure embodying my'present invention.

1 is one of the journals of the trolley pole 2 secured to the s indle 21, hearing on both Q .'ends arms 22 ..-this piston-bears the cross head 6.

' are connected respectively to said cross head he lifting device comprises the cylinder 8 with a piston 3. The rod 7 of Springs 5 andto the arms 22 of the trolley pole spindle.

- assented Jan. 7, 1908.

A tube .13 provided with change "12 passes through the cover 23 of the cylinder 8 and projects into the cylinder. A iston 4 sliding with a central boringon t e tube 13 is fitted in the cylinder 8-, the stroke of. said piston being limited at one end by the cover 23 and by the flange 12 at the other end. As the stroke of the piston 3 extends throughout the whole length of the .c linder 8, ,the

rod 7 of saidpiston isprovide with a recess 19 entered by the flange 12 when: the piston 3 accomplishes its stroke from the position shown in Fig.2 to that one'shown'inFig. 3. To avoid the compression of the air in the recess 19 at this time an air escape 20 is provided in the flange 12.

24 and'27' are two three-phase induction motors. primary windings of the motor 24 are con' Two of the wires 25 leading to the nected with the trolleys,while the third wire 26 maybe earthed'.

18 is theispeed controller, that is tosa a switch for connecting the motors'24 an 27 in cascade, or directly to' the line. speed controller comprises a plurality ofsta- The tionary contact plates 29, 31, 33, 34 anda movable switch member 17, fitted-with insulated contact brushes 36 and 37. The switch member is mounted on a piston 15 sliding in a cylinder 16. 1 a

The connections of the motors and the controllerare' the following: The secondary of the motor 24 is connected by the wires 28 to the contact plates 2.) and the primary of the motor 27 is connected by the wires 32 to the contact plates 33. The secondary of the motor 27 is connected by wires 30 to the contact plates 31. The-contact plates 34 are connected through the conductors 35 to a starting resistance 14 oliany suitable kind.

The-contact brushes 36'and'37, sliding on the stationary contact plates, establish-in the lower position of the switch member 17,

on one hand, the connection between the plates 29 and 33 and, onthe other hand \he connection between the plates 311'and 34. Hence, the secondarycurrent of.the motor 24 will flow through the wires 28, plates 29, brushes 36, plates. 33 and wires 32 to the primary winding of the motor 27; and the secondary current of this '-n1otor 27 will .fiow through the wires 30, plates 31-; brfishes 37, plates 34, wires 35 to th e startingfrhoostat 14 tha t is to 'say', the motors will be connected to'run inlcascade; =When, however,

- the switch member .is elevatedto'the posi 24 -flows, then, throng 'the'wires 28, plates tion shojwn in the drawingthe brushes 36 connect the plates 29 with heplate's 34, and

break the connection between the lates 31' and 34, The seconda' current of t e motor 29, brushes 36, plates 34 and wires 35'direct1y to the startin'grheostat 14 and the motor 27 his, through the pipe 38, in constant connecbranch 43 leadin c linder 16"and t valve between the pipes 44' and 46. a

The valve 41 -may be a suitable sliding" tion with the cyhnder 16 above the piston.- rose the ,switch'member 17 in its lowerposition. A

15, the tendency then being to pipe v39-an' i a branch lead to the speed controlling valve 41. l The pi e 42 connected to the casing of the valve 41 1s branched, one into the lower part of the:

e other branch, 44, leading t rough the valve 45 and-pipe 46 to the tube 13 10fthe trolley lifting cylinder. Apipe-Q connects, through the valve 10, "cylinder 8 'with the pipe 39. The valve 10' is adapted to connect the pipe 9 either with the pipe 39, or through the outlet 47 with the atmos phere. The valve 10 may be operated by means of the handle 48 actuating a similar valve connecting, in the position shown in the drawing, the pipe 42 with the valve chamber 49 ahd shutting the outlet 50. This position corresponds to the high speedon single connectmn of the motor 24. If the handle 51 of the controlling valve is turned in the opposite position, correspondin to the low s eed or cascade connectionoi the motors, t 1e pipe 42 is connected throughthe outlet with the atmosphere.

When the trolley pole is lowered, (Fig. 9) on the one hand the valve 10 connectsthe ipe 9, and thus the cylinder chamber be: hind the piston 4, and on the other hand the valve 45 connects the pipe 46, and thus the chamber between the pistons 3 and 4, with the'atmosphere.-,.-; At this time the controlling valve 4l is in the position connecting pipe 42, and thus the chamber. under the piston 15 of the controller, through outlet 50 with the atmos here. w

To lift the trol cy pole, the valve 10 is turned in the position connectin the pipe 9 with the pipe 39, and, hence, the chamber behind the piston 4 with the reservoir 11.

The compressed air entering the cylinder 8 between the piston-4 and the cover 23,, will push the iston 4 outward until this latter abuts on t e flange 12. Thereby the .piston 4 will force the .piston 3 into the position shown 2, stretching the springs 5 in the causing, byimeans of the arms 22 and thespindle 21, the trolley pole 2 to rise and the trolley tb bepressed against thetrolley wire with the ressure corres ending to the low speed of the car producei by the motors run: .in cascade connection. The motors may .be' now's tarted by means of the rheostat 14'; If hereafter it is desired to run the.

car with'the'high speed, the controller lever 51 is brought to the position shown in Fig. 1 of the drawings, whereby the valve 49 will ut communication the pipes 40 and 42.

he compressedair will flow, on the one hand, through the pipe 43 into the lower chamber of the cylinder- I6 and as the lower face of the piston15is larger than the uper face, the piston will be lifted, together with the switch member, into the position shown in 1 of thedrawing, esta lishing the single or high speed running connection of the motor 24.

position shown'in Fig. 1, thereby increasing thetension of the springs 5 and, therefore,

the lifting" pressure acting on the trolley pole l .On the .otherfhand, the corn ressed air flow through the pipe 44, va ve 45, pipe 46 f .and tube, 13--into the space between'the pistons 3 and-4 and will force the piston 3 to the 2. lithe-controllingvalve is again turned osi'tion corres'pondin to the .low speed, t e lower chamber of t e cylinder 16 is connected with the atmosphere and the switch member, dropping in its lower position, w. 1% connect the motors in cascade. At the same time the air escapii' from the space between the pistons 3 and '4 t irough the tube 13, pipes '46, 44 and 42 and the outlet 50, will allow the iston 3 to return in the position shownin I ig. 2, thus decreasing the tension of the springs 5 and, therefore, the lifting pressure acting .on the trolley pole to the amount required at low speed.

The arrangement shown and described is only an. example, it being obvious that it may be Varied without altering the scope of my .invention. Thus, ,for example,- the 'switch may be constructed so as to connect the motors 24 and 27 to the line in multiple for high speed running, instead of cutting out theinotor 27, such direct connection of both motors to line under certain conditions. osscssing obvious ad antages. This is i lustrated in Fig. 4 where the I arallel connection of motors is shown. If t 1188 induction inotors are provided which may be run in triple cascade, cascade and direct (either single or multiple) and thus three grades of speed be produced,- the pressure acting'fonrth'e trolle lifting device may. be increased correspon ingly in three steps; Thisis shown in Fl 8. 5, 6 and 7. Fig. 7 shows the' osition of t e device when .the pole is in t e position of minimum pressure or lowered. Air-admit- 'ted by pipe 9 puts the parts in the positions indicated in Fig. 6. Thereafter air admitted by pipe 13 ,puts the parts in the positions indicatcd in Fig. 0.

-vice. of the trolley according to' the speed of the motor, corresponding to the position of the motor controller. -F'urther, thelifting device may be arranged in such a manner. that the. springs act normallyio press the trolley with. the maximum pressure on the trolley nircand the pistons may act against the springs, diminishing the pressure of the springs withthe increasing air pressure. In this case the pressur" of the compressed air' should, of course, diminish, when the speed of the/car rows. This is illustrated in Fig. 8 whcrc tlic extcnsion of tho cy 'linders-opcrates to diminish the forcefof tlic springs, as will be readily uinlerstood-. I Certain l'eatures of invcntion described but not claimed herein are the subject of my c'o-'. pending application lilcd NQYPLlllKIgT, 1903, Serial No. 182,701. i

Having thus des rilicd one cinhodimcnt iifl my invention, what I claim and desireo-sc cure by letters Iatent'is: *1

1. The combination with an electric chi cle, of an electric conductor, an clcctricicu rent collector, a ilurality'of electric motos lo! propelling said vehicle, a controller l'or ll?! the connections oi said motors-tor rim'i'ilug-speeds of d i ll'erent orders, -aiid iiicans lor pressing the collector toward ihc coi ducl r with relatively low pressure when the motor connections are arranged lol a runnin; specd ol'r-lativel low order, and lor pressing the collector toward the' conductor with relatively high pressure when the motor connections are arranged for a running-speed ol relatively high order. i

2. The combination with an electric vehiole, of an electric conductor, an electric current collectona plurality of induction motors for propelling-said vehicle, a controller for arranging the connections of said motors in singlc and 'in cascade, and means for automatically pressing the collector toward the conductor witha relatively low pressure when the motorsarcarrangcd in cascade, and for pressing the collector toward the conductor" with relatively high pressure when the motors are connccted'in single.

3. The combination with an electric vehiole, of an electric conductor, a current col lcctor, a plurality oi motors and fluid-oper'- atcd moans for arranging; said motors to-vary the speed of the vehicle and for simultanci ously varying thcprcssui'c of the collector toward tho conductor.

4. The combination with an'elcctric vehicle of an electric conductor, a current col lector, a plurality of motors and unitary means independent of the current flowing to the motors for arranging said motors to vary the speed of the vehicle and for simultanemisly varying the pressure of the collector toward the. conductor.

5'. The combination with an electric vehicle. of an clcctric conductor, acurrent collector, a "plurality of motors, a controller, lluidfopcra tcd means controlled by said controller fnrarranging said motors to vary the s peed of thc vehicle and fluid-operated means simultaneously controlled by said controller forfvarying thc'pressure of said collector toward said conductor. v i

6: The combination with an electric vchi-.

ole, an electric conductor, an electric current -collcctor,'a plurality of induction motors, a

starting device for said motors, switch mechanism tor aid motors, means for automaticallyl aotuatingsaid' switch to connect said motors directly and in cascade, such means 'also operating to press the collector-against the I conductor with relatively great force wlicna motor isrnnning singly and with less forco when the motors are running in cascade. 7., 'The .coiiibination with an electric vehi 't ri urrcntj collector, a'starting device for Isa d motor,supply of compressed fluid, a sn 1'- icchanisin for said inotor, ineans for cxe, crate, :thclatter, and" means for simultanel y n-'pp l vliigilluid pressure tort-ho collector the-latter in contact with said i(inductor"whenthe vehiclois at rostf and' means connected with s'aidst'artcr for automatically increasing the for-cc exerted to press said collector against=said conductor when the Vehicle is ill-motion.

S. 'lhgL -oinbination with an electri vehiclc, oi a'plurality of motors', a starting evicc l or said motors,a n electric conductor, an eleclriccurrent collector, switch mechanism for m iiinect'ingsaid motors d iroctly or in cascade, a compressed fluid supply, ancansjor condnc.ting 'the fluidto the switch to' operate the latter, a piston and piston chamber mounted adjacent to the current collector, a connec tion hctween said piston and tho collector,

moans lor conducting a supply oflluid to the piston chamber to operate the and press the collectoragainst l and a controller-for regulating: thc admission piston thcrcin of air to theswitchaml to the piston chamber.

,i' i'lluid pressure upon thoswitch to op lc, 'of ajinoitor an electric conductor, an-elccln witness whereol l have signed in name to this specification in the presence uf twosuhscr limg wu nesscsr (IOLOMAN DE KANDU. \Vitncsscs': i

Louis Vaxnoau,

'FRANK E. MAL c'rr. 

